Gas-generator for fumigating apparatus.



W. G. DINGLB & F. J. HAMILTON. GAS GENERATOR FOR FUMIGATING APPARATUS.

APBLIGATIO N FILED JULY 31, 1912v Patented July 1', 1913.

, h an strnrns PATENT o-Fmcn.

wmuame. nrnGtEANn rommsm J; HAMILTON, or. Los AneE Es, camroama.

Speciflcationpf Letters Patent.

GAS-GENERATOR FUMIGATING APPARATUS.

Batented'July 1; 1913.

Application filed M11131, 1912: Serial 1510.371 2,552.

To all whom it may concern:

Be it :known that we, WILLIAM G. DINGLE and Fonnrs'rJ. I'IAMILTON,citizens of the United States, residing at the city of Los 'Angeles, inthe county of LosAngeles and State of California, have invented new=a=nd useful Improvements in Gas-Generators for Fu'migating Apparatus, ofwhich the following is a specification; Y

Ourlnventlon relates. primarily to gas generators for citrus treefumigating but. may beappliedtoothe'r plants besides citrus there iscaused-a violent: ebullition in. the. receptacle and 'it' frequentlyhappens thatv some of-Jtheliquid contents-of the receptacle is blown outof the same and-into contact with the foliage of the tree and with thewalls. of the tent thereby. destroying the foliage and burning holes inthe tent. Aftera given length of time haselapsed the tentis removed fromthe tree and the contents of the receptacle dumped on the ground;Frequently minute globules of; acid? are in the residuum and sink intothe earth and damagethe tree roots and particles of potassium cyanid lieupon the earth and are eaten I by birds and if in the neighborhood ofthe [farm house are eaten by domestic fowls thereby causlng their death.

It is the object of our invention to produce a simple; pprtableapparatus in which the hydrocyamc acid gas-can be. generated and l thenconveyed under the tent on the tree thereby avoiding all danger ofburnin the foliage or the tent, and in which the resi uum will 'beretained in a container until the work of fumigating the orchard or agiven part thereofhas been -done,- when the residuum can be dumped insome place where there is no danger of birds or fowls having accessthereto and where the residuum can be treated if desired to recover itsbyproducts.

A further object is to produce an apparatus in which a given quantity ofhydrocyanic acid gas can be manufactured and drawnofi'for liquefactionand subsequent use for tree. orother fumigation. We accomplish theseobjectsby the apparatus described herein and illustrated in the.accompanying drawings forming a part hereof inwhich:

Figurel is a side elevation. Fig. 2 is an end elevation partly insection.

Inathe drawings. 5 isa truck. in the side 'framefi of'which is mountedthecontainer? which is preferably provided in the lower portion with anacid; resistant lining (not :shown) The container is preferably mountedpivotall-y to expedite cleaning when neces} sary. Within the containeris a mixingapot 8 which is providedwith trunnions Sand. 10.-

Trunnion 10' extends through the sideoft'he' container and its outervend is-bent to form an. operating handle 11, so as to-be able to:turnthe mixing not upside down as hereinafter explained. Thecover 12 ofthe container is removablysecured to the body to facilitate cleaning.the container.

Upon the cover. of the container is mount- -ed an acid receptacle 13'WlllCll is connected- ;by pipe 141 with a graduatechamber 15 the. wallsof. which are preferably of glass having ascale (not shown) markedthereon. A- cock 16 on pipeJ14- is. opened orclosed-"to open or closecommunication between the receptacle and chamber. Leading from thebottom of the graduate chamber and extending through thecover and intothe container is the discharge pipe 17 having a cock 18 thereon Theinner end of pipe 17 terminates above pot 8 so as to discharge thereinthe acid that flows therethrough. A water and potassium cyanidreceptacle 19 is also mounted on the cover of the-container. A' pipe 20having a cock 21: thereon connects receptacle 19 with a graduate chamber22 the wallsof which are preferably of glass having a scale '(not shown)markedthereon. Leading from the bottom of chamber 22 :is pipe-23having acock 24 thereon. This pipe extends through thecontainer- -coverandterminates above pot 8 so as to discharge therein.

Leading out of the top of the container is thedischargepipe 25 having acock 26 there on. To the end of ipe 25 is connected the hose (not shown)w ich leads the gas under the tent to the tree to be fumigated whenusing the apparatus for fumigatin one or more trees at a time. A gage'2may be provided on pipe 25 to show the gas pressure in the container.

In the use of our apparatus for fumigating trees, a supply of acidsufiicient to fumigate a certain number of trees is placed in the acidreceptacle after cock 16 is closed. As much cyanid of potassium andwater, well mixed together, sufficient to be used with the acid isplaced in receptacle 19 after cock 21 is closed. The apparatus is thendrawn to the tree to be fumigated, cocks 18 and 24 are then closed andcocks 16 and 21 opened. .As soon as the required amount of acid for atree of that size has run into the graduate chamber cock 16 is closed.At the same time the solution of water and potassium cyanid are runninginto the other graduate chamber and when the required amount is in thechamber cock 21 is closed and cock 24 opened. Plugs 30 and 31 infittings 32 and 33 may be opened to facilitate'the escape of the liquidfrom the graduate chambers. As soon as the solution runs into pot 8cock18 is opened and the acid is discharged into pot 8 thereby producinghydrocyanic acid gas which passes through the discharge pipe and thehose (not shown) under the tent and tree. As the gas generates veryquickly, in a moment all the gas generated by the charge has passed intothe tent except a small amount in the container. Cock 26 is then closedand the apparatus is drawn to another tree. The contents of pot 8 aredumped into the bottom of the container and another tree is fumigated inlike manner. As the apparatus is moved from one tree to another theresiduum in the bottom of the container will be shaken up so that allthe potassium cyanid will be dissolved and all. the acid will be used aswell, and a further supply of gas generated which will pass out of thecontainer at the next tree so that all the material is utilized. By theuse of our apparatus only gas is brought into contact with the tent andtree and injury to both is thereby avoided. After the contents ofreceptacles 15 and 19 are utilized a new supply may be provided forother trees and the residuum dumped into the bottom of the container maybe drawn out through pipe 28 which leads from the bottom'thereof and isprovided with a cock 29 to control the flow of material therethro-ugh.

When the apparatus is used to make a quantity of gas for liquefactionthe mixing pot would be of sufficient capacity to hold as suitableheating apparatus and the gas led much acid, water and salts as it wasdesired to manufacture at a time and the gas would I be run through acondenser to liquefy it.

If desired the gas can be liquefied as it liquefies at 80 degreesFahrenheit and can be converted into its gaseous form by a heat greaterthan 80 t degrees Fahrenheit. A charge of liquid gas could be placed ina under the tree and tent. When liquefying the gas the dumping 'potcouldbe omitted and in tree fumigating the dumping pot could be omitted butthe apparatus would not Work quite as well as with it.

Having described our invention what we claim is: 7

1. A gas generator for fumigating apparatus comprising a container; apot in said container; means to convey a solution of water and cyanid ofpotassium into said pot; means to convey sulfuric acid into said pot;

.means to invert said pot to dump the contents thereof and means toleadthe gas from the container.

2. A gas generator for fumigating apparatus comprising a container; apot in said container, said pot being revolubly mounted; meansto conveya charge comprising a solution of'water and cyanid of potassium intosaid pot; means to convey a charge of sulfuric acid into the water andpotassium cyanid in the pot; means to invert said pot to dump thecontents thereof; and an. outlet from said container.

3. A gas generator for fumigating apparatus comprising a container; areceptacle for sulfuric acid and'anotherreceptacle for water and cyanidof potassium mounted on said container; a pot mounted in said container;means to invert said pot to dump the contents thereof; graduatesexterior said container betweensaid receptacles and said pot; pipesconnecting said receptacles and said graduates; valves on said pipes;pipesextending from said graduates and discharging into said pot; valveson said last pipes; and an outlet from said container.

In witness that we claim the foregoing we have hereunto subscribed ournames this 1 21st day of July, 1912.

WILLIAM G. DINGLE. F. J. HAMILTON.

Witnesses FRANK \VA'rERrmLn, G. E. HARPHAM.

